Returns
A return is a new inbound shipment, not a reversal of the outbound tracking number. You issue an RMA in your system, print a prepaid label to your warehouse, and send that label to the customer. Happy Returns drop-off is a different intake path for retailers on that program.
How a return should be set up
The customer city and postal code are the origin. The warehouse you name is the destination. If those two are reversed, the carton comes back to the buyer. Weight should match what you expect inbound; under-declaring still corrects on the invoice when we measure.
Tell the customer to use the original inner packing when the item is fragile, and to remove outbound barcodes so only the return barcode is scanned. A carton with two live barcodes can missort.
Who pays and when it is not this tool
Prepaid returns bill the account that printed the label. Collect returns bill the receiving account only when that option is on the contract. Do not ask the customer to pay a new card on a look-alike site. See Protect Against Fraud.
Volume store drop-off, inspection photos, and routing to liquidation sit on Happy Returns. Network-level reverse logistics programs sit on Returns Logistics.